GVL_DEBUG          99 thread_win32.c     if (GVL_DEBUG) fprintf(stderr, "gvl acquire (%p): acquire\n", th);
GVL_DEBUG         119 thread_win32.c     if (GVL_DEBUG) fprintf(stderr, "gvl init\n");
GVL_DEBUG         126 thread_win32.c     if (GVL_DEBUG) fprintf(stderr, "gvl destroy\n");